Process of rolling bars or girders or i, h, u, or like section.



J. PUPPE. PROCESS OF ROLLING BARS 0E GIRDERS OF I,

H, 11, OR LIKE sncwrow. APLIUATION FILED JULY 1, 1912.

4 SHEETS-SHEET 1.

Fig.1.

i E 525: %M I lnueniur': 5 a

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Patented Oct. 28, 1913.

J. PUPPB. PROCESS OF ROLLING BARS OR. GIRDEES OF I, H, U, 0R LIKE SECTION.

APPLICATION FILED JULY 1,1912.

Patent-ed M228, 1913.

J. PU'PPE.

PROCESS OF ROLLING BARS 0R GIBDBRS OF I, H, H, 0B LIKE SECTION. APPLIOATIOH rum) JULY 1, 1912.

1,076,784. Patented 0ct.28,1913.

4 BHEETBSHBET 3.

Fig.3.

J. PUPPE.

PROCESS OF ROLLING BARS 0R GIRDERS OF I, H, U, 0R LIKE SECTION. APPLICATION FILED JULY 1, 1912.

Patented Oct. 28, 1918. 1 iEEETS-SHEET 4.

mm m E E j j i a restricts, fla ors-c, B'ttfththitti, oiirrtnzsnta rrtocsss or "schools it, it, it, oh with seorror torc es.

glisyplicotitni tiled the Process of the Rolling: of lists or quired dimensions before the liintl operation.

GlldBIS of if, H, ti, or iilte Section, of which the following is specification This invention relates to at new and iro proved process in tho rolling ct? hers and girders of if, ht, U or like section.

According; to one known method of: rolling; bars or girders of ll or toll section, the hers or girders are rolled to the required. size ot the welt) end the flanges in ordinary grooved rolls, the posses or which are so shaped as to produce double l section. The flanges are then str-nightcncd by means or? c speciei finishing roll. having coasting horizontal and vertical rolls."

Another known method consists in pro ducinglccre cit douhle t section innnivcrsel rolling mills whereby the edges of the flanges streoctcd upon simultaneously by the horizontal and vertical. rolls of the un ve'rsal stands While being in. their inclined positions with regard to the control Wei). According to the second method too, the flanges are finelliz strcightcned in :1 finish ing univcrshlro'l. Both known methods have the fectsrc ih common that the edges of the flanges are rolled While the flanges sic in their inclined positions with rcgcrd to the central Web, so thst both the Web end the flanges ere precticclly rolled to the required size While the beam has n riouhle h section, and the stratigtcningot the thtnges is effected by c singie pass in e. special mill after the beam has been. rolled to the. are quired size. ,i

According to both known methods, prccticelly the Whole rolling operation opplies to a. beam of double if section and the straightening of the flanges, so as to make them lie one plane, represents-only the final and not veryimportant step of the Process, since the beam is already relied to the retakes place.

The known method in which the in sin universal roll eitects only the-reduction of the thicknesses of the web and the flanges, and the secondstend of rolls serves for shaping the edges of the are in their inclined 1 ,osition with regard "to the Web, hos-the disadvantage that "the hpectticdtic'c of etters ifetcnt.

flanges, While the flanges Patented @ctfifi, rots.

tests! it). t emor.

forces acting upon the blank do not produce it compression of the material of the flanges, lntt servo mainly to bond the flanges outwardly or in themselves. This is particularly the ocse when tho Width of the flanges is very considerable.

lit is not possible with the lrnown methods to make the critter, of the flanges parallel to the Wch as the edge of the r011 which prcsscs upon the ends or the flanges must he suiliciently inclihcd to prevent sliding of tho i l-tinge outwardly. lit might of course be nttempted to ovoid the bending of the fiah res due to the inclined pressure by the cmpdoynicnt of latter-cl, suitably formed, vcrticsl rolls. This arrangement, howeveg'hmi two disndrentogcs. The vertical rolls must not he higher then. the corresponding dimchsicn of the final pass, end fins will therefore he stormed up'on the oiitside cit the long-es during the first posses. It is also necessary to adjust the vertical rolls after each pose in the vertical direction, or to miss the hottcm horiztcntel roll after each pa s. This manner of remedying the theadvantages of the lmown method leads therefore to considerable complications, whereas according to the invention the smooth vertical rolls of the second stand remein in their vertical position and need be adjusted only in the horizontal direction, which con he done by very simplev mechani col means. Another disadvantage lies in the tact that the inclined "feces of the rolls which act upon the edges of the flanges exert only an indirect pressure. Owing to this indirect pressure and the inclined position or the ltlcngcs the material of the flanges is not sufficiently Worked upon, more especially the outer portions of the flanges do not get any compression. The outer portions of the fieng'cs ore, however, subjected to the greatcststrains, so that it is of the utmost importance that the material of the flanges should he tl'ioroughly orked through and compressed during the rolling operetion.

Metallographic cuts. show that the material of the Web Of beams rolled in universalmills is very close and compact owing; to the direct pressure exerted upon the web during the rolling, While the material of the outer portions of the flanges shows :1 for less close structure.

In the accompanying drawings which illustrate my invention in more or icssldiagrammatical fashion, Figure it shows the pass the flanges are straightened as shown .incides with the direction of the plane in set of rolls for rolling an unfinished I beam with outwardly bent flanges, employed in the first step of the process, Fig. 2 shows the set of rolls for straightening out the flanges, employed in the second step of the process, Fig; 3 shows the set of rolls for' rolling the flange edges, employed in the third step of the process, Fig. 4 shows a set of rolls for rolling an unfinished U beam with outwardlybent flanges, employed in the first step of the process, and Fig. 5 shows a set of rolls for straightening out the U beam flanges and for rolling their edges, employed in the second and third'step of the process.

According to the present invent-ion the flanges are alternately bent outwardly and straightened so that flanges are at right angles to the Web when the edges of the flanges are acted upon. This has the advantage that verystrong direct rolling pressure is exerted upon the flanges which cowhich the flanges extend during the rolling of the edges, resulting in a strong working through and compression of the material of the flanges. The improved method may be carried out in the following manner. The beam passes first the stand of universal rolls shown in Fig. 1, whereby the flanges are given the known inclined position with regard to the web by the horizontal rolls a and b and the vertical rolls a and d. The double Y shaped beam now passes through the universal rolling mill shown in Figs. 2 and 3, which may be placed immediately behind the first rolling stand containing the rolls shown in Fig. 1.v During the forward in Fig. 2 by the action of the vertical rolls h and 9. During the next pass the beam returns through the same stand. During this operation the vertical rolls h and g are moved away as 'shown in Fig. 3, and the edges of the flanges 2', i, 2', i, are acted upon by the horizontal rolls 6 and f. The beam then passes again through the first stand whereby the straightened flangesare again bent outwardly by the inclined faces of the horizontal rolls. a. and Z). This process is repeated until the beam has been rolled out to the required size.

In applying the improved method to the rolling of U-ir0n, the rolling may be carried out as follows :The U-iron passes first through a set of universal rolls of the kind shown in F ig. 4 whereby the thicknesses of the web and the flange portions are reduced, the flanges being'in their inclined position. The U-iron then passes the second universal mill shown in Fig. 5 in which the flanges are straightened by two vertical rolls, and are rolled in their straightened position. The edges or faces K, 7c of the top horizontal roll are laterally slidable upon the main body land are adjusted after each pass in such a manner as to engage closely the profile of the U-iron. The U-iron then returns through the same roll and passes again through the first stand in which the flanges are again bent outwardly. This operation is repeated until the U-iron is rolled' to the required size.- It will be seen that in thiscase the edges of the flanges are worked upon in the direction of the rolling pres-' sure.

I claim:

Process for rolling of bars or girders of the I, H and U or like sections in universal rolling mills, consisting in alternately bending out and straightening the flanges and in simultaneously rolling the web and the flanges, each in a direction transverse to its respective plane when the flanges are bent out, and in rolling the edges of the flanges in the direction of their respective planes when the flanges are straightened out.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

, *JOHANN PUPPE. Witnesses:

HENRY I-IA'sPER,

W OLDEMAR HAUPT. 

